Unlike her Save Cave, Wrinkly does not do much else, such as exercising, sleeping, or playing the Nintendo 64, although she does keep track of the Kongs' progress. The interior of Wrinkly's Retreat shows the pattern from the evil barrier sealing the Banana Queen on three sides of the wall and a small pool of water in the center. Each Banana Bird that the Kongs have rescued are shown moving around the place.
After obtaining every Banana Bird then returning to Wrinkly's Retreat, the Banana Birds fly out of Wrinkly's Retreat and carry the Kongs up with them to the Banana Queen. This triggers a secret ending involving the Banana Queen getting her revenge on Baron K. Roolenstein.